US7540273B2 - Supporting element - Google Patents

Supporting element Download PDF

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Publication number
US7540273B2
US7540273B2 US10/537,668 US53766803A US7540273B2 US 7540273 B2 US7540273 B2 US 7540273B2 US 53766803 A US53766803 A US 53766803A US 7540273 B2 US7540273 B2 US 7540273B2
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US
United States
Prior art keywords
support element
fuel injector
fuel
recited
distributor line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/537,668
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English (en)
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US20060266892A1 (en
Inventor
Martin Scheffel
Werner Berger
Rainer Norgauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERGER, WERNER, NORGAUER, RAINER, SCHEFFEL, MARTIN
Publication of US20060266892A1 publication Critical patent/US20060266892A1/en
Application granted granted Critical
Publication of US7540273B2 publication Critical patent/US7540273B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, e.g. clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the present invention relates to a support element for setting a fuel distributor line apart from a fuel injector inserted in a cylinder head of an internal combustion engine.
  • a mounting device for mounting a fuel injector on an intake manifold is described, e.g., from German Patent 29 26 490.
  • a mounting element axially fixes the fuel injector to the fuel-distributor line or to a plug nipple, the mounting element being designed as a U-shaped securing clamp having two legs which are elastic in the radial direction.
  • the securing clamp engages in matching recesses of the plug nipple and is snapped into place in a recess in a connection fitting of the fuel injector, the recess being designed as an annular groove.
  • the axial clearance between the recesses and the securing clamp as well as between the annular groove and the securing clamp should be kept small in order to achieve precise fixation of the fuel injector without stresses on the gasket.
  • German Patent 29 26 490 Particularly disadvantageous in the mounting device described in German Patent 29 26 490 is the warping effect of the various mounting elements on the fuel injector.
  • the force magnetic flux generates in the fuel injector leads to deformations and thus to lift changes of the valve needle, and even to jamming as well as a compressive and bending load on the housing components, which usually have thin walls and are welded to each other at several points.
  • any mounting measure for example by means of a contact flange, leads to an increase in the radial expansion of the fuel injector and thus to higher space requirements in the installation.
  • the support element for a fuel injector has the advantage over the conventional art that the fuel-distributor line is braced at the fuel injector without radial forces via the support element. As a result, no warping and subsequent damage of the fuel injector and the connection of the fuel-distributor line will occur.
  • the support element not only transmits the holding-down force of the fuel-distributor line to the fuel injector but also provides a flexible fixation that compensates for tolerances and offsets.
  • the support element is easy to produce by stamping from sheet metal. It may also be produced by deep-drawing and stamping.
  • the support element according to the present advantageously dispenses with screws or securing clamping claws for mounting the fuel injector on the front face of the cylinder head.
  • Punched out recesses which are easy to produce, advantageously provide secure fixing of the support element at the fuel injector and simple bracing of the fuel-distributor line.
  • Especially advantageous in this context is the contacting of the edges of the support element along the axial extension of the support element in a radially inward direction, so that the support element abuts against the fuel injector along its entire length, thereby preventing the support element from bending open.
  • Various tab forms may be configured in such a way that a more or less pronounced elastic and plastic deformation allows optimal bracing between the fuel-distributor line and the fuel injector under the given installation situation.
  • FIG. 1A shows an exploded, schematic, part-sectional view of an exemplary embodiment of a fuel injector able to be combined with a support element configure according to the present invention, prior to mounting.
  • FIG. 1B shows a schematic, part-sectional view of the exemplary embodiment shown in FIG. 1A , in the mounted state.
  • FIG. 1C shows a plan view of the exemplary embodiment of the support element configured according to the present invention, shown in FIGS. 1A and 1B .
  • FIGS. 2A-2D show four example embodiments of support elements configured to be free of radial forces.
  • FIGS. 3A-3C show three different views of a fifth example embodiment of a support element free of radial forces.
  • FIG. 4 shows a sixth exemplary embodiment of a support element free of radial forces.
  • FIGS. 5A-5C show three different views of a seventh example embodiment of a support element free of radial forces.
  • FIGS. 1A through 1C show schematized part-sections through an exemplary embodiment of a fuel injector 1 , a fuel-distributor line 2 , and a support element 3 which is configured according to the present invention and to be mounted in-between, shown in a view before ( FIG. 1A ) and after ( FIG. 1B ) mounting of said components.
  • a fuel injector 1 is designed in the form of a direct-injection fuel injector 1 , which may be installed in a valve seat of a cylinder head for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having externally supplied ignition (not shown further).
  • the valve seat may also be provided at a connecting piece of an intake manifold (not shown).
  • fuel injector 1 is provided with a plug connection to a connecting piece of fuel-distributor line 2 , which is sealed by a gasket 5 between fuel distributor line 2 and a supply nipple 6 of fuel injector 1 .
  • Fuel injector 1 has an electrical connection 7 for the electrical contacting to actuate fuel injector 1 .
  • Support element 3 is provided to space fuel injector 1 and fuel-distributor line 2 apart from one another in a manner that is free of radial forces.
  • Support element 3 is made up of a clamp 8 , which is braced against a shoulder 9 of fuel injector 1 on one side and against a shoulder 10 of fuel-distributor line 2 on the other side.
  • clamp 8 has a slot in the region of electrical connection 7 of fuel injector 1 .
  • FIG. 1C It may be gathered from FIG. 1C that the first exemplary embodiment of a support element 3 configured according to the present invention has a round cross-section. Alternative forms are shown in FIGS. 3C and 4 .
  • clamp 8 Two tabs 11 are connected to clamp 8 and provide flexible bracing of fuel-distributor line 2 with respect to fuel injector 1 .
  • a detailed representation of clamp 8 may be gathered from the views in FIGS. 3A through 3C , 4 and 5 A through 5 C, as well as from the following description.
  • FIGS. 2A through 2D show schematic, part-sectional views of portions of the fuel-injection system shown in FIGS. 1A and 1B , in the region of connection nipple 6 of fuel injector 1 and fuel-distributor line 2 .
  • FIGS. 2A through 2D represent various example embodiments of bracing the radial forces between support element 3 and fuel injector 1 in the case of support elements 3 having a round design.
  • FIG. 2A shows a first, least complicated embodiment in which support element 3 is guided by a guide element 12 , which may be the cylinder head, for example, in such a way that a radial displacement of support element 3 in response to the pressure exerted by fuel-distributor line 2 is impossible.
  • a guide element 12 which may be the cylinder head, for example, in such a way that a radial displacement of support element 3 in response to the pressure exerted by fuel-distributor line 2 is impossible.
  • support element 3 is provided with an at least partially circumferential groove 13 , which, together with a projection 14 formed at shoulder 9 of fuel injector 1 , ensures, by mutual engagement, that tabs 11 of support element 3 do not shift radially.
  • a beveling of shoulder 9 of fuel injector 1 and/or tabs 11 of support element 3 also suggests itself for the bracing of fuel injector 1 at shoulder 9 in manner that is free of radial forces.
  • shoulder 9 is inclined at an angle ⁇
  • both shoulder 9 of fuel injector 1 and tabs 11 of support element 3 are inclined, preferably at the same ⁇ angle. This measure, too, can prevent shifting of tabs 11 under axial force.
  • the variant of an embodiment illustrated in FIG. 2C has the advantage of uncomplicated manufacturability, support element 3 being able to be adopted unchanged.
  • FIGS. 3A through 3C and 4 represent schematic views and partial sections of exemplary embodiments of a support element 3 configured according to the present invention, in the unmounted state. Equivalent components have been provided with corresponding reference numerals in all figures.
  • FIG. 3A shows a side view of an example embodiment of a support element 3 configured according to the present invention
  • FIG. 3B a frontal view
  • FIG. 3C a plan view from above
  • FIG. 4 shows a plan view from above of an example embodiment that is to be considered an alternative to FIG. 3C .
  • FIG. 3A shows support element 3 configured according to the present invention with clamp 8 and tabs 11 .
  • Tabs 11 due to their form and their extension at clamp 8 , are configured in such a way that they may be deformed plastically/elastically, thereby introducing an axial force into fuel injector 1 .
  • clamps 11 rest against shoulder 9 of fuel injector 1 .
  • FIG. 3B shows a view of the slotted side of support element 3 .
  • electrical connection 7 of fuel injector 1 lies in the region of slot 15 .
  • FIGS. 3C and 4 in the same view, show two example embodiments of support element 3 , viewed in the discharge direction.
  • Support element 3 is not round on one side but has a roughly rectangular or square cross-section form in order to prevent radial shifting of support element 3 in response to the axial introduction of force by fuel-distributor line 2 .
  • Such force may lead to warping of fuel injector 1 in the cylinder head or deformations of fuel injector 1 and subsequent malfunctions, for example by jamming of the valve needle of fuel injector 1 .
  • edges 16 which form the end of clamp 8 on both sides of slot 15 , are folded radially inward in the direction of fuel injector 1 . This ensures that edges 16 contact fuel injector 1 along their full axial length, so that shifting of support element 3 is prevented.
  • FIG. 4 has the advantage of simple manufacturability and a high clamping effect, whereas the exemplary embodiment illustrated in FIG. 3C effectively prevents the edges from bending open.
  • FIGS. 5A through 5C show an additional exemplary embodiment of a support element 3 configured according to the present invention. It has annular tabs 11 , which are connected to clamp 8 . A recess 17 in annular tabs 11 provides higher elasticity of tabs 11 and thus greater tolerance with respect to axial twisting. Edges 16 may be configured as shown in FIGS. 3C or 4 .
  • the present invention is not limited to the exemplary embodiments shown and is also applicable to fuel injectors for injection into the combustion chamber of an internal combustion engine having self-ignition.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
US10/537,668 2002-12-04 2003-09-10 Supporting element Expired - Fee Related US7540273B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256668.2 2002-12-04
DE10256668A DE10256668A1 (de) 2002-12-04 2002-12-04 Stützelement
PCT/DE2003/003008 WO2004051074A1 (de) 2002-12-04 2003-09-10 Stützelement

Publications (2)

Publication Number Publication Date
US20060266892A1 US20060266892A1 (en) 2006-11-30
US7540273B2 true US7540273B2 (en) 2009-06-02

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US10/537,668 Expired - Fee Related US7540273B2 (en) 2002-12-04 2003-09-10 Supporting element

Country Status (6)

Country Link
US (1) US7540273B2 (de)
EP (1) EP1570171B1 (de)
JP (1) JP4291273B2 (de)
KR (1) KR101032261B1 (de)
DE (2) DE10256668A1 (de)
WO (1) WO2004051074A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060232061A1 (en) * 2005-04-15 2006-10-19 Yasushi Fujiwara Clamp device
US20090126674A1 (en) * 2005-12-14 2009-05-21 Yamaha Hatsudoki Kabushiki Kaisha Engine and vehicle
US8701632B2 (en) * 2012-07-24 2014-04-22 Ford Global Technologies, Llc Fuel injector mount
US20140123952A1 (en) * 2012-11-05 2014-05-08 Keihin Corporation Support structure for fuel injection valve
US20140325809A1 (en) * 2011-11-29 2014-11-06 Piolax, Inc. Mounting tool
US20160025053A1 (en) * 2013-01-18 2016-01-28 Robert Bosch Gmbh Fuel injection system having a fuel-conducting component, a fuel injection valve and a connection element

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358912A1 (de) * 2003-12-16 2005-09-08 Robert Bosch Gmbh Brennstoffeinspritzsystem
US7373926B2 (en) * 2004-02-26 2008-05-20 Robert Bosch Gmbh Support element
DE102004015042A1 (de) 2004-03-26 2005-10-13 Robert Bosch Gmbh Stützelement
JP4634765B2 (ja) * 2004-09-16 2011-02-16 日産自動車株式会社 燃料噴射弁取付構造
DE102006018194B4 (de) * 2006-04-19 2010-06-10 Winkelmann Powertrain Components Gmbh & Co. Kg Vorrichtung zur Befestigung eines Einspritzventils in einer Ventilaufnahme einer Brennkraftmaschine
DE102010017725B4 (de) 2010-07-05 2018-05-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einspritzanordnung für eine Brennkraftmaschine eines Kraftfahrzeugs
JP6119446B2 (ja) * 2013-06-18 2017-04-26 スズキ株式会社 デリバリパイプ

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US20040237939A1 (en) * 2003-05-28 2004-12-02 Mitsubishi Denki Kabushiki Kaisha Fuel injection device
US6830037B1 (en) * 2004-01-27 2004-12-14 Delphi Technologies, Inc. Anti-rotation fuel injector clip
US6874477B1 (en) * 1999-04-20 2005-04-05 Siemens Vdo Automotive Corp. Fuel injector mounting arrangement
US7210462B2 (en) * 2004-03-26 2007-05-01 Robert Bosch Gmbh Support element
US20080105236A1 (en) * 2003-12-17 2008-05-08 Robert Bosch Gmbh Support Element
US7373926B2 (en) * 2004-02-26 2008-05-20 Robert Bosch Gmbh Support element

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JPS5893957A (ja) 1981-11-26 1983-06-03 バイエリツシエ・モ−ト−レン・ウエルケ・アクチエンゲゼルシヤフト 内燃機関の燃料噴射装置
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JPH09291866A (ja) 1996-04-30 1997-11-11 Nissan Motor Co Ltd エンジンのインジェクタ固定装置
US5893351A (en) * 1996-10-15 1999-04-13 Denso Corporation Fuel supply device having slip-out preventing member and method for assembling the same
US5724946A (en) * 1996-11-22 1998-03-10 Siemens Automotive Corporation Fuel rail and injector assembly
US5803052A (en) * 1997-06-27 1998-09-08 Siemens Automotive Corporation Spring clip for retaining a fuel injector in a fuel rail cup
DE19748593A1 (de) 1997-11-04 1999-05-06 Bayerische Motoren Werke Ag Hochdruck-Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine, insbesondere Otto-Motor
US6053149A (en) * 1998-05-28 2000-04-25 Siemens Automotive Corporation Fuel injector clip retention arrangement
JP2000018127A (ja) 1998-07-07 2000-01-18 Hitachi Ltd インジェクタ及びその保持装置
US5970953A (en) * 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
WO2000042315A1 (en) 1999-01-12 2000-07-20 Siemens Automotive Corporation High pressure injector clip
US6874477B1 (en) * 1999-04-20 2005-04-05 Siemens Vdo Automotive Corp. Fuel injector mounting arrangement
WO2001048370A1 (de) 1999-12-24 2001-07-05 Robert Bosch Gmbh Ausgleichselement
US6276339B1 (en) * 2000-05-02 2001-08-21 Delphi Technologies, Inc. Fuel injector spring clip assembly
US6748925B1 (en) * 2000-10-30 2004-06-15 Siemens Automotive Corporation Injector and fuel rail assembly for installation on an integrated fuel rail
DE10056038A1 (de) 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzanlage
WO2002068815A1 (de) 2001-02-28 2002-09-06 Robert Bosch Gmbh Befestigungsvorrichtung
WO2002068813A1 (de) 2001-02-28 2002-09-06 Robert Bosch Gmbh Brennstoffeinspritzventil
US6637411B2 (en) * 2001-03-27 2003-10-28 Denso Corporation Fuel supply device having slip-out preventing member
US7063075B2 (en) * 2001-10-24 2006-06-20 Robert Bosch Gmbh Fixing device
WO2003038267A1 (de) 2001-10-24 2003-05-08 Robert Bosch Gmbh Befestigungsvorrichtung
WO2003054383A1 (de) 2001-12-20 2003-07-03 Robert Bosch Gmbh Befestigungsvorrichtung
US6705292B2 (en) * 2002-04-02 2004-03-16 Siemens Vdo Automotive Corporation Apparatus and method of connecting a fuel injector and a fuel rail
US6668803B1 (en) * 2002-12-03 2003-12-30 Ford Global Technologies, Llc Fuel injector retention arrangement
US20040237939A1 (en) * 2003-05-28 2004-12-02 Mitsubishi Denki Kabushiki Kaisha Fuel injection device
US20080105236A1 (en) * 2003-12-17 2008-05-08 Robert Bosch Gmbh Support Element
US6830037B1 (en) * 2004-01-27 2004-12-14 Delphi Technologies, Inc. Anti-rotation fuel injector clip
US7373926B2 (en) * 2004-02-26 2008-05-20 Robert Bosch Gmbh Support element
US7210462B2 (en) * 2004-03-26 2007-05-01 Robert Bosch Gmbh Support element

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US20060266892A1 (en) 2006-11-30
JP2006509143A (ja) 2006-03-16
KR101032261B1 (ko) 2011-05-06
JP4291273B2 (ja) 2009-07-08
KR20050085342A (ko) 2005-08-29
DE50309555D1 (de) 2008-05-15
DE10256668A1 (de) 2004-07-29
EP1570171B1 (de) 2008-04-02
WO2004051074A1 (de) 2004-06-17
EP1570171A1 (de) 2005-09-07

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